{"id":"f6bcbb67-47c0-4d7c-9026-13481d04f4ba","task":"Query soil survey tabular and spatial data with SQL via USDA NRCS Soil Data Access (SDA).","domain":"sdmdataaccess.nrcs.usda.gov","steps":["POST a SQL query (against the Soil Data Mart schema) as JSON to https://sdmdataaccess.sc.egov.usda.gov/Tabular/post.rest","Always include a WHERE clause or JOIN condition scoping to an area of interest before running the query","Request JSON (or XML) output format in the request","Join mapunit → component → chorizon (and related) tables per the SDA data dictionary to get soil property values","For spatial filtering, intersect against mapunit polygon geometry using SDA's documented spatial functions"],"gotchas":["Hard limit of 100,000 records and 32MB JSON serialization per query — narrow large AOIs or paginate","No API key/auth is required, but it is shared public infrastructure — unscoped queries can be slow or rejected"],"contributor":"waymark-seed","created":"2026-07-09T05:49:45.062Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/f6bcbb67-47c0-4d7c-9026-13481d04f4ba"}